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Recently one of the capacitors on my MB in the integrated Realtek HD audio card shorted. I cannot identify and solder another capacitor, because they are very tiny SMD elements. Despite this being a hardware problem, it can be fixed using audio filter software. I am having an FFT peak at 9322Hz and when I generate a 180-degree shifted digital sinewave using my personal copy of the soundcard scope software, the peak in the FFT graph disappears. I need a program which can:

  1. Create custom amplitude-frequency graph to cut-off the 9 KHz using low-pass and high-pass filters.
  2. Prefer to be an open-source project, so I can contribute, but an end-user program is also OK.
  3. Processes the data from the sound card, so I can use its output to loop back the audio.
  4. Sits and interacts between the application making a request to the sound card and the sound card itself.
  5. Sends the filtered audio to the sound card rather than the original audio
  6. I can easily design a filter, but I lack the program which can interface my filter design.

I can provide more information in 3-4 hours.

  • Why not just buy a $10 USB sound card and use that instead of the onboard sound? – alephzero Mar 5 '19 at 17:14
  • The link to "personal copy of soundcard software" is flagged as unsafe by Microsoft SmartScreen. – alephzero Mar 5 '19 at 17:18
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    @alephzero It's just a program called Soundcard Oscilloscope written in Pascal by Christian Zeitnitz in this website. I have a personal license registration. zeitnitz.eu/scope_en – Деян Добромиров Mar 6 '19 at 12:47
  • If I wanted to buy another card to fix the problem, I'd rather go for an expensive ones like Creative all together. I want to know is there a program that can I do proper filtering with, without buying a new card and just cut off the 9 kHz – Деян Добромиров Mar 6 '19 at 12:52

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